John Carew Eccles was a neurophysiologist whose research explained how nerve cells communicate with one another. He demonstrated that when a nerve cell is stimulated it releases a chemical that binds to the membrane of neighboring cells and activates them in turn. He further demonstrated that by the same mechanism a nerve cell can also inhibit the electrical activity of nearby nerve cells. For this research, Eccles shared the 1963 Nobel Prize for Physiology or Medicine with Alan Lloyd Hodgkin and Andrew Huxley.

Born on January 27, 1903, in Melbourne, Australia, Eccles was the son of William James and Mary Carew Eccles. Both of his parents were teachers, and they taught him at home until he entered Melbourne High School in 1915. In 1919, Eccles began medical studies at Melbourne University, where he participated in athletics and graduated in 1925 with the highest academic honors. Eccles's academic excellence was rewarded with a Rhodes Scholarship...